Threshold Ventures
Threshold Ventures is an early-stage venture capital firm based in Menlo Park, California that backs founder-led technology companies at the threshold of breakout growth. Threshold is the 2019 rebrand of Draper Fisher Jurvetson (DFJ), the storied Sand Hill Road firm founded in 1985; managing partners Emily Melton and Josh Stein spun the venture practice into an independent, focused fund. Threshold pursues a high-conviction strategy, concentrating on a small number of Series A and Series B investments and partnering hands-on with founders for the long term, frequently holding board seats through IPO and beyond. The firm invests across enterprise software and SaaS, developer tools and infrastructure, fintech, digital health and healthcare, and AI. Its portfolio has produced 10 unicorns, 3 IPOs, and 17 acquisitions, and includes Box, Twilio, Redfin, Remitly, Doximity, Rippling, LaunchDarkly, Livongo, and Talkdesk. Threshold has invested in roughly 87 companies and raised a ~$250M fund following the rebrand.
Threshold Ventures has 86 portfolio companies tracked on the APIs.io network, of which 86 (100%) publish APIs indexed here.
Its highest-rated API providers on the network are Twilio, LaunchDarkly, SugarCRM, Box, Doximity.
Portfolio on the Network
Portfolio companies that publish APIs indexed on APIs.io, grouped by their API Evangelist rating. Exemplar and Strong are expanded by default.
Exemplar 2 Complete, well-documented, and agent-ready
Strong 4 Solid coverage with minor gaps
Developing 15 Usable, with meaningful gaps to close
Thin 6 Limited public surface area
Emerging 22 Early or largely undocumented
Minimal 33 Almost no public developer surface
Unrated 4 Not yet scored
Properties
Firm
The firm itself
Cohort brief
Auto-generatedThe 82 portfolio companies with APIs in the catalog, backed by Threshold Ventures, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Access Clarity | 29.1 | 22.3 | +6.8 | 82 |
| Contract Governance | 7.1 | 6.4 | +0.7 | 82 |
| Developer Ergonomics | 18.2 | 17.9 | +0.3 | 82 |
| Contract Quality | 17.5 | 17.5 | 0 | 82 |
| Operational Transparency | 11 | 11.3 | -0.3 | 82 |
| Discoverability | 59.8 | 60.4 | -0.6 | 82 |
A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.
| Artifact | This cohort | Catalog | Difference |
|---|---|---|---|
| MCP server (any) | 18% | 16% | +2 |
| MCP server (first-party) | 7% | 7% | 0 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 7% | 9% | -2 |
| Security | 94% | 88% | +6 |
| Arazzo workflows | 4% | 2% | +2 |
| Governance rules | 15% | 13% | +2 |
mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.
- 1 Box 41.9
- 2 FrontApp 41.4
- 3 Twilio 38.5
- 4 Doximity 36.9
- 5 LendKey 36.1
- 6 Forward Networks 33.8
- 7 Ritten 31.5
- 8 Freshpaint 29
- 9 Veritus 29
- 10 CircleCI 28.3
Source (apis.yml)
Work with this as data
Every firm here is available over the APIs.io API and to AI agents over MCP.